Funding for this research was provided by:
Economic and Social Research Council (1187016)
Text and Data Mining valid from 2018-09-22
First Online: 22 September 2018
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.